Many, if not all, service providers require you to install some sort of software when you subscribe to their email service. It's entirely possible that your ISP uses a "runtime" netscape, imbedded in their software, for some or all of the functions that let you send and receive stuff through their server.

Some email services use your own "default" browser, so it's possible your setup has some conflict in settings (unlikely unless you've used netscape?).

You can certainly look on your machine and see if the file "netscape.exe" is there somewhere; although even if you find it, figuring out where to "put it back" would almost certainly require assistance from your service provider. (It's not on my machine, although Real Player loads a "netscape" folder with what appears to be a few "tranlator" .dll files.)

If the problem happens only when you try to attach the photo - i.e. if you can send email without attachments, you can try pasting the photo in the message. With most(?) email programs, you can right click on a photo that's pasted into a message and "save picture as" to extract it. The only disadvantage is that you usually get the picture at "screen resolution" of 72 dpi, regardless of what resolution was pasted in. You can improve the quality a little by resizing the picture to "as large as you can put on the page" before you paste it, if you have an appropriate image program.

There's too much variation in the "add-in" software that most email services load for anyone to make very helpful general guesses. The best source should be your service provider's help desk.

John